Hi Uncle Bob,
This is way out my specialty area, but I can provide some educational material.
As you have not specified which of the various types of glaucoma you have, I will limit myself to those manifesting the most common core feature, elevated intraocular pressure. These comprise the vast majority of cases.
Best as I understand it, if there is no other eye disease, no history of eye pathology or surgery that may have created pockets where air could be trapped on ascent, and vision is adequate to the requirements of diving, there should be no major impediment. However, it would seem prudent for the diver to avoid any upside down positions, violent equalizations or other maneuvers that may substantially increase intraocular pressure.
Of course, you will want to obtain clearance from your ophthalmologist.
This is educational only and does not constitute or imply a doctor-patient relationship. It is not medical advice to you or any other individual, and should not be construed as such.
Best of luck.
DocVikingo